Filter.



n N. G. GOREAU.

FILTER. v PPLmATioN FILED FEB., 16,11907'.

Patented Apr. 20, 1909.

UNiTED sTATEs PATENT N oEEIoE.

NELSON Gr. GOREAU,.OF NEW ORLEANS, LOUISIANA, ASSIGNOR TO OO-RO MANUFACTURING COMPANY, OF NEW ORLEANS, LOUISIANA, A CORPORATION OF LOUISIANA.

FILTER.

specification of Letters Patent.

Patented April 20, 1909.

Application :filed February 16, 1907. Serial No. 357,679.

.To all 'whom it may concern:

Be it known that I, NELSON G. GOREAU, a citizen of the United States, residing at New Orleans, in the parish ofOrleans and State of Louisiana, have invented a new and useful Filter, of which the following is a speciication.

My invention relates to filters, and. especially to an economical, simple and durable form of construction for the same, and to cleaning mechanism incorporated in the filter which serves to clean it eectively without dismounting any parts'of the apparatus or interfering with theprocess of filtration.

The characteristics and advantages of my invention are hereinafter more particularly set forth in connection with a detailed description of the accompanying drawing which illustrates eXemplifying structures in which the invention is embodied, and in which- Figure 1 is a `vertical section; Fig. 2, a detail `view of the `toggle mounting for the Scrapers; and Fig. 3, a detail view of -a modied scraper mounting.

Reference numeral 1` designates the bottom plate; 2,V the top plate; 3, annular washers or packing carried in annular sockets in the top and bottom plates respec tively; 4, the jacket or shell consisting of a cylindrical tube the ends of which rest on the washers 3; 5, a vertical central bolt screwed at its'lower end into a socket in the bottom plate; 6, the lter stones of any suitable material which have acentral bore and of which the lower one rests upon a washer 7 interposed between it and the bottom plate, and each of the others, which may be of any desired number, rest upon a washer 8 interposed between it and the'next lower stone;

9, a collar surrounding Vbolt 5 near its upper end having a flange 10 bearing upon the upper surface of the upper stone and being formed with a socket 11 containing balls 12;

13, a nut engaging a screw-thread 14 on the.

bolt and Vbearing upon the collar, and serving when set up to force the collar down upon the top stone and so to lock all the stones rmly together and upon their washers, thus making they stones and bottom plate practically an integral structure; 15,

the upper end of bolt 5, preferably of reduced diameter; 16, a screw thread thereon; and 17, a nut engaging thread 16.r

'After the stones are put in place and locked, theV jacket 4 is put in position, the top plate 2 put in place and nut 17 then screwed down serving to firmly lock the bottom plate, top plate, and-shell together, and to compress the washers 3, forming a watertight casing for the entire structure.

18 is a horizontal scraper arm having a hub 19 which is in the form of a sleeve surrounding the bolt, and the lower end of which is formed into a cone running on balls 12.

20 is the upp'er end of the hub formed into a bearing turning on part 15 of the bolt as a journal; 21, a gear carried by hub 19; 22, a pinion engaging the gear; 23, a shaft carrying the pinion and passing through a stuffing-box in the top plate; 24, a crank arm and handle on shaft 23; 25, a vertical scraper armsecured at its upper end to horizontal arm 18; 26, scrapers, preferably one for each stone, although a single scraper may in some cases extend the whole height of all the stones; these scrapers are preferably made trough-shaped as shown in Fig. 2, with two edges 27 bearing againstthe stone at a proper angle to most effectively scrape off slime or other deposits on the stone, and in vsome cases disposed at such an angle as to cut olf a part of the stone itself if conditions require it. The exact form and arrangement ofthe scraper' may, however, be considerably varied.y

40 are toggle arms pivotally mounted on arm 25 at 41; 42,'other toggle arms pivoted to arms 40 and mounted pivotally on the scraper at 43; 44, gear teeth formed on the ends of the toggle arms adjacent to each other and serving to make these arms move in unison; and 45,springs serving to extend arms 40, 42. i

Operation of this mechanism evidently 'serves to force the scrapers into contact with the stones.

33 are flanges provided on the ends of each scraper, lying against the ends of the corresponding stones and serving as guides for movement of the Scrapers, preventing them ,from riding up and down and wearing or cutting the periphery of the stone unevenly; 34, an vanti-friction roller carried by the lower end of vertical arm 25 bearing against the shell and serving to take up the thrust of the springs exerted against the lower end of said arm; 35, a similar roller carried by the horizontal. arm 18 near the hub and ruiming on the upper face of flange 10; 36, any suitable supply pipe entering the space exterior to the stone either through the top plate, as shown, or at any other convenient point; 3T, the discharge pipe for filtered water communicating with the central bore of the stone ,and 23S, a discharge pipe for slime and waste created in cleaning the stones, controlled by a valve 39.

In operation, fluid` to be filtered enters the casing through supply pipe 3G, passes through the stones into the central bore, and out through the discharge pipe 37. VJ hatever fluid is filtered there is more or less deposit left on the exterior faces of the stones, and this requires to be cleaned off more or less frequently in order that the process may be efficiently continued. To clean the stones in my invention, the crank arm 24 is revolved, turning pinion 22, gear 21, and hub 19, and so revolving horizontal arm 18 and the vertical arm 25 with it around the stones in the space between them and the shell, causing edges 27 of the scraper to remove the deposit and if conditions require it, a part of the stone itself which may have become impregnated with foreign matter. The operation of cleaning is rendered easy by the mounting of hub 19 on ball bearings and the provision of anti-friction rollers 34 and 35; in some cases the ball bearing may be dispensed with, and in this case, anti-friction rollers 35 running on flange 10 serves to keep the parts in alinement, or hub 19 may have a plain bearing upon the cylindrical portion of collar 9. Springs 45 serve to keep the scrapers constantly' in contact with the peripheries of the stone and as the latter wear away the particular shape of the springs l employ gives them a wide range of action and enables them to keep the Scrapers in proper position even when the stones are worn to very small diameter. It is to be noted that the guide flanges 33, as the stones wear away, keep the lower end of the scraper always in proper relation to the stone and prevent it from moving up and cutting the stone irregularly.

When the cleaning process is going on, valve 39 is open and the waste product passes out through discharge pipe 3S wit-hout interfering with the process of filtration except in so far as the reduction in pressure may be effective.

The toggle arms 410, 42, serve to support scrapers 26 rigidly at all times and to keep them properly alined, and at the same time have a very wide range of' movement, servinga to keep the Scrapers firmly in contact with the stones when the latter are new, or very much worn and of small diameter.

In Fig. 3 is shown a modified form of spring mechanism for the Scrapers. In

this construction the toggles are dispensed with, and springs 2S having coils 29, are used to connect the scrapers with scraper arm 25. The straight arms of the springs lie against arm 25 and the scrapers for a considerable part ot' their length, and this braces the springs and enables them to withstand the thrustbrought on them in operating the scrapers, without getting out of' line. Two sets of springs, such as shown in F ig. are preferably used for each scraper, one near each end thereof.

l It is to be understood that I do not limit myself to details herein, but contemplate any changes in the structure which come within the spirit ot' my invention.

I claim:

1. In a filter, a scraper held in Contact with the stones, and having a flange engaging a flat surface of a stone and serving as a guide.

2. In a lter, a scraper having two oppositely-disposed blades in contact with the stones, and a flange engaging a plane surface of the stones and serving as a guitle.

3. In a filter, a scraper arm, a scraper, and toggle arms connecting the arm and scraper, gear teeth on the arms causing them to move in unison, and springs urging the scraper away from the arm.

4c. In a filter, the combination with the stones, of a scraper arm mounted to revolve about the stones, one or more Scrapers, means carried by the arm for holding' the scrapers against the stones, and flanges on the scrapers engaging the ends of the stones and serving as guides.

5. In a filter, the combination of a scraper arm, a scraper and one or more sets of toggles connecting the arm and the scraper, each set comprising two pairs of toggle arms pivoted to the arm and the scraper, the arms of the pairs being pivoted together oppositely, gear teeth on adjacent ends of the arms of the two pairs of toggles causing them to move in unison, and means urging the toggles to extended position.

6. In a filter, the combination with the stones, of a scraper arm revolubly mounted in relation to the stones, one or more mechanism connecting the arm and scrapers.

7. In a filter, the combination with the stones and casing, of a vertical sc `aper arm mounted revolubly in relation to the stones, one or more Scrapers carried by the arm and pressed against the stones, and an antifriction bearing member Carried by the arm and engaging the easing for taking up the thrust of the arm.

8. In a filter, the combination of a casing, a base plate, a top plate, a central shaft connecting the plates, a collar secured to the shaft engaging the stones and having a recess, a hub surrounding the shaft, a ball bearing for the hub contained in the recess in the collar, and ahorizontal scraper arm carried by the hub.

9. The combination in a filter, of a filtering cylinder, a rotatable body at one end of the cylinder having an arm and a bar eX- tending from the arm and alongside the cylinder; means for rotating the said rotatable body, a scraper movable with the said bar aroundthe cylinder, and a pressure-exerting device arranged between the bar and the scraper and comprising pairs of toggle members; the members of yeach pair being pivoted together and to the bar and scraper, and springs coiled about the pivotal connections between the members of the pairs and having arms engaging and arranged to move the said members outward.

10. The combination in a filter,"of a iltering cylinder, a rotatable body located at one end of the cylinder and having an arm and a bar extending from the arm and alongside the cylinder, means for rotating the said rotatable body, a soraper'movable with the said bar around the cylinder, and

a pressure-exerting device arranged between the bar and the scraper and comprising pairs of toggle members; the members of each pair being pivoted together and to the bar and scraper and having gear segments at their outer ends intermeshed with gear segments on the outer' ends of the members of the other pair, and springs coiled about the pivotal connections between the mem bers of the pairs and having arms engaging and arranged to move the said members outward.

l1. In a ilter, the combination of a casing, a base plate, stones resting on the base plate, a top plate, a central shaft connecting the plates, a collar secured to the shaft and clamping the stones, a hub revolubly mounted on the shaft and a scraper' arm carried by the hub.

In testimony whereof I have aiiiXed my signature in the presence of two witnesses.

NELSON Gr. GOREAU. 

